メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((140.2375000 35.7708334, 140.2437500 35.7708334, 140.2437500 35.7750000, 140.2375000 35.7750000, 140.2375000 35.7708334)) ^^http://www.opengis.net/ont/geosparql#wktLiteral